You absolutely can join my Facebook group. Here’s the link: https://www.facebook.com/groups/tribebuildersnetwork/
If you’re asking how I collect emails here on Medium, I use the form I created on Upscribe. You can create your own right here: https://upscri.be/
When you create your form, make sure you offer something irresistible to get people to sign up.
See you in the Tribe Builder’s Network!